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H.1AFFE. RADIATOR FOR INTERNAL COMBUSTION ENGINES.

APPLICATION FILED JULY 16,1918.

Patented July 22, 1919.

W ESSE S:

, rant ornipn i rmrrn, or cnrcaeo, ILLINOIS.

I IATOR FOR INTERNALCOMBUSTION ENGINES.

Specification of Letters Patent.

Patented July 22, 1919.

' Application filed Jul 16,1918. Serial No. 245,160.

To all whom it may concem:

Be it known that I, HARRY J AFFE, a citizen of the United States, and aresident ofthe city of Chicago, in the county of Cook taken inconnection with the accompanying sheet of drawing, forms a full, clear,and exact specification, which will enable others skilled in the art towhich ,it appertains to make and use the same.

My invention relates generally to imrovements in radiators for internalcomustion engines; and it consists, essentially,

- in which the motor cylinders are cooled by water surrounding thecylinders, which water, is conducted to the radiator and is cooledtherein by currents of air contacting with the cooling surfaces of theradiator. For this purpose, a radiator comprises a series of verticallydisposed water tubes, con- -1necting the upper and lower water chambersin said radiator structure, and a series of air conduits between eachadjacent pair of water tubes. My invention is especially directed to thelatter part of the radiator; and is fully illustrated in the drawingsforming a part of this specification, and in which Figure 1 is a frontelevation of fragments of a radiator, the figure beingrather'diagrammatic, to convey an idea of the appearance of the cellularstructure of the radiator, and not illustrative of the specific detailsof con.- struction disclosed in other figures. Fig. 2 is a verticaltransverse section drawn on a magnified scale, the section being on line2-2 of Fig. 1. Fig. 3is a similar view disclosing a slight modificationof my invention. Fig. 4 is a plan of a fragment of a strip of sheetmetal formed to comprise a part of this structure, and Fig. 5 is an edgeview of the same. Fig. 6 is an edge view, and Fig. 7 is aplan view ofthefiller strip employed in the air spaces of the radiator.

-Fig. 8 is a plan View of this latter strip view of a small portion ofthis filler strip,

showing fins which project into the air spaces to aid in the coolingprocess.

Like parts are designated by the same characters and symbols ofreference in all the various figures.

A, in the drawings designates the casing of a radiator, which casing maybe of any desired or'known shape or configuration, the one illustratedbeing of a well-known manufacturer of automobiles.

In the face, and the back wall of this casing there are large openings12, through which the cellular core B is passed, and to which walls thecore is thoroughly soldered. This core comprises a series of units 0,each of which is formed of a strip, or strips of sheet metal, as showndetached in Figs. 4: and 5, said strips being of proper width and lengthto correspond to the width and height of the core. This strip is crimpedor-corrugated transversely, the angles ofthe crimps 13, formingsubstantially two sides of a hexagon at the outer margins of this strip,while the intervening crimps between the marginal crimps are of a lesseraltitude, so

that when two of these strips are placed face to back with the outercrimps in contact, there is formed between them a narrow passage D,which constitutes the water tube in the core. In the preferredembodiment of my invention, this crimped strip or ribbon is madesomewhat longer than twice the height of the core, it being bent andturnedupon itself as shown at 15, Fig. 2, so that the crimps orcorrugationspoint in opposite dimotions, and spaced apart to formbetween them an air conduit E. The complete core is made up of amultiplicity of these units so that there is in each unit an air spaceE, and between adjacent units a water tube D, as clearly shown in Fig.2. The crimps be tween the marginal crimping 13 may be angular, as shownat 14 in Figs. 4 and 5, or

they may be curved, as illustrated at 14?, in

In the air spaces there are located filler strips F, illustrateddetached n Figs. 6, 7, 8, and 11; each of said filler strips beingformed of a ribbon of sheet metal, shown fiat in Fig.

8. This strip F is of a width corresponding to that of the strip formingthe water tubes; and this strip F is bent or formed in a peculiarmanner. It has, pointing in opposing directions, a series of angularmembers 16, the angularity of which approximates the angularity of theunit strips between its marginal crimps 13, and horizontally disposedmembers 17, so that when the formed filler strip F is placed into theair space E, one of the angular members 16 contacts with thecorresponding crimp 14 of one wall of the water tube. It is then formedto cross over so that its portion 17 is horizontally disposed andreaches to the adja- 20 cent wall of the unit,- and follows the crimpedportion thereof and then again crossed over to the first-mentioned wall;and this crossing back and forth continues through the entire height ofthe unit. It will now be noted that one of the unit walls forms a seriesof two members of a hexagon and the opposing wall forms twocomplementary members thereof, while the cross bars 17 complete thehexagonal contour of so the cells.

In the longitudinal margins of the filler strip F there are a series ofnotches or excisions 18, of predetermined spacing so that when the stripis bent alon the dotted lines 19,-Fig. 8, to form a comp eted filler,these notches 18 will be in the angular portions 16 of this strip. Itfollows that this strip, by its horizontal portions divides the airspace into a corresponding number of air conduits, approximatelyhexagonal in transverse contour; and that owing to the notches 18 in thefiller strip, the angular portion. thereof prevents contact at itsmarginal edges with the corresponding marginal edges as of the unitmembers, except at the narrow portions 20 between. said notches. Theobject of thus notching the filler strip is principally to save solderin the process of uniting the parts. Thus when a core has beenassembled, it is dipped with. its face into a bath of liquid solder to adepth of approximately'i of an inch; and this solder will coat andadhere to all of the metallic surfaces thus immersed into the solder inaddition to entering the joints of the parts to be united. The coatingof these exposed surfaces is practically a waste of i,.'sol der,

which cannot be avoided, so that by notching the filler strips asdescribed, a part of the metal that would otherwise be tinned,

is removed. This may appear at first si htv to be a small matter ofsaving solder, ut when it is considered that there are a large number ofunits in each core, and the large 6 number of radiators manufactured,this saving of solder, amounting to probably one pound in each core, isquite an item in the cost of manufacturing radiator cores.

The object of the filler strips inthe air spaces is to increase thecooling surfaces of the core by transmitting the cooling influence ofthe filler strips to the walls of the units, or in other words, toabstract, heat fromthese walls.

In some instances it is advisable to form the units with single stripswithout the bends 15 therein, and to secure the ends thereof to plates21, having slotted apertures for the reception of these ends, aconstruction preferred by somemanufacturers so of. motor vehicles, tothe one heretofore described.

In order to increase the cooling efliciency of the fillers, I providethe same with a multiplicity of incisions 22, Figs. 2, 8, and 11; andbend the portions between these incisions, as shown 1n Figs. 2 and 11 at23, which portionsproject into the air conduits, and are, therefore,directly affected by the air passing through the conduits. Any number ofthese elements 23 may be provided to obtain the desired result.

I have hereinbefore described the preferred embodiment of my invention,but I desire it to be understood that minor details may be changed, andparts omitted without departing from the scope of my invention asdefined in the subjoined claims.

Having thus fully described my invention, I claim as new, and desire tosecure to myself by Letters Patent of the United States- 1. A. radiatorof the nature described, including a casing, and a cellular core, saidcore comprising a series of vertically disposed water tubes, and aseries of air spaces between adjacent water tubes, said water tubeshaving V-crimped walls, there being between adjacent water tubes anairspace, and in each air space a single filler strip, said filler striphaving crimped members contacting alternately with one wall, and thenwith the opposing wall of said water tubes, and horizontal memberscontacting with both walls thereof, there being in the filler stripsmarginal notches in the crimped portion thereof, said walls of the watertubes and the filler strip between adjacent water tubes affording thehexagonal, cellular, structure.

2. In a radiator core of the cellular type, having water tubes and airspaces between the water tubes, a filler for the air spaces, said fillerbeing a strip of sheet metal, there being in the marginal edges of saidstrip spaced apart notches, said strip being bent and rebent so that theportions between the notches form horizontally disposed separating barsto divide said air space into a series of horizontal conduits, therebeing in said strip approximately medially of its 130 width a series ofincisions, said incisions being in those portions of the filler stripwhich, after the strip has been bent and rebent, contact with opposingwalls of the water tubes, the portions of said strip produced by saidincisions being bent to project into said conduits.

3. In a radiator of the nature described,

a water tube, said water tube consisting of' two strips of sheet metal,said strips being continuously crimped along their longitudinal margins,each crimp forming 'two members or sides of a regular hexagon, saidstrips being also crimped between the marginal crimps and in the samedirection, but the medial crimps being of lesseraltitude than themarginal crimps to form when these twostrips are placed face to backwith the marginal crimps in contact, a narrow passage, said passagehaving the contour of the medial crimps of said strip, there being inthe radiator between each adjacent pair of .water tubes a single fillerstrip, said filler strip being a sheet metal ribbon having a series ofbent portions, said ribbon being vertically bent to afford two angularlydisposed members forming two sides of a regular hexagon, then bent toafiord a horizontally disposed cross bar, then again vertically bent toafford two angularly disposed members forming again two sides of aregular hexagon but in a direction opposed to the first-mentionedangularly disposed members, which members contact with two sides ofthe'crimps in the walls of one of the water tubes, the other angularlydisposed members of the filler strip contacting with two sides of thecrimps in the walls of the adjacent water tubes, whereby every alternatecrimp in the water tubes is reinforced by the angularly disposedvertical crimped portions of the filler strip, there being in thelongitudinal margins of said angular portions of the filler stripnotches for the object specified. 1

In testimony that I claim the foregoing as my invention, I have hereuntoset my hand.

HARRY J AFFE.

